212100203312 has 20 divisors (see below), whose sum is σ = 413073394200. Its totient is φ = 105500617728.

The previous prime is 212100203311. The next prime is 212100203383. The reversal of 212100203312 is 213302001212.

It is not an unprimeable number, because it can be changed into a prime (212100203311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34339562 + ... + 34345737.

It is an arithmetic number, because the mean of its divisors is an integer number (20653669710).

Almost surely, 2^212100203312 is an apocalyptic number.

It is an amenable number.

212100203312 is a deficient number, since it is larger than the sum of its proper divisors (200973190888).

212100203312 is a wasteful number, since it uses less digits than its factorization.

212100203312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68685500 (or 68685494 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 212100203312 its reverse (213302001212), we get a palindrome (425402204524).

The spelling of 212100203312 in words is "two hundred twelve billion, one hundred million, two hundred three thousand, three hundred twelve".